For tumors affecting the bottom half of the bile duct, the cancer is removed with a Whipple operation. For tumors in the top half of the bile duct, surgical treatment often requires removal of the tumor together with a liver resection (removal) in an attempt to provide a surgical cure.
How long for plastic water bottle to decompose? An average time for a plastic bottle to biodegrade fully is approximately 450-1000 years. However, there are many different kinds of plastic in the world, most commonly the haâ¦rd and reusable ones, which take a longer time, and the soft and non-reusable ones, which take a shorter time.
Fact. Analysis: Decomposition or Biodegradation is the chemical dissolution of materials through bacteria and other biological means. It takes significant period of time for a material to decompose completely, depending upon the type of material and the method of degradation.A paper towel may decompose in 2-4 weeks, and a plastic bag takes several thousand years to degrade and decompose completely.You can find more about the decomposition process in reference section. The Wikipedia page lists the typical amount of time it takes for the decomposition of various materials.act. Analysis: Decomposition or Biodegradation is the chemical dissolution of materials through bacteria and other biological means. It takes significant period of time for a material to decompose completely, depending upon the type of material and the method of degradation.